[RFC PATCH BlueZ 4/4] test: functional: add bearer ReadRSSI test

[Kevin Dewald <kevin@simpleble.org>]

Read the RSSI of the LE connection from both hosts, and check ReadRSSI
fails with NotConnected once disconnected.

Assisted-by: Claude:claude-opus-5.5
---
 test/functional/test_bearer.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/test/functional/test_bearer.py b/test/functional/test_bearer.py
index 59ce8ef7d..36b614348 100644
--- a/test/functional/test_bearer.py
+++ b/test/functional/test_bearer.py
@@ -283,6 +283,29 @@ def test_bearer_le_conn_params(hosts):
             assert host.bearers.get(remote.bdaddr, LE_INTERFACE, name) is None
 
 
+@le_config
+def test_bearer_le_read_rssi(hosts):
+    host0, host1 = hosts
+
+    connect_le(host0, host1)
+
+    for host, remote in peers(host0, host1):
+        wait_until(
+            lambda: host.bearers.get(remote.bdaddr, LE_INTERFACE, "Connected") is True
+        )
+
+        # The emulated controller reports -1 dBm for every connection
+        host.bearers.call(remote.bdaddr, LE_INTERFACE, "ReadRSSI")
+        reply = host.bearers.expect(f"{LE_INTERFACE}.ReadRSSI:reply")
+        assert reply.values == (-1,)
+
+    disconnect(host0, host1, LE_INTERFACE)
+
+    host0.bearers.call(host1.bdaddr, LE_INTERFACE, "ReadRSSI")
+    error = host0.bearers.expect(f"{LE_INTERFACE}.ReadRSSI:error").error
+    assert error.get_dbus_name() == "org.bluez.Error.NotConnected"
+
+
 @host_config(
     [
         Bluetoothd(conf=LE_CONF, args=ARGS),
-- 
2.54.0 (Apple Git-157)